300 ultra downrange trajectory question>>

At what point downrange does a 200 or 220gr. SMK become "flatter" than a 180gr. SMK? I realize this all is related to muzzle velocity to begin with, so lets just assume approximate max vel. in each loading. I hope thats clear enough for yall to at least give me some ideas! 1000 yards is about as far as I am concerned with.

I have a really basic program, so these may not be exact. There are a lot of guys on this board with nice programs that can probably give you better info, but here goes.
Just assume 180 gr BC .5 at 3400 Zero at 300 yards; 220 gr BC .7 at 3000 Zero at 300 yards: